Effect of adherence to self-monitoring of diet and physical activity on weight loss in a technology-supported behavioral intervention

Jing Wang, Susan M. Sereika, Eileen R. Chasens, Linda J. Ewing, Judith T. Matthews, Lora E. Burke

Research output: Contribution to journalArticle

52 Scopus citations

Abstract

Background: Examination of mediating behavioral factors could explain how an intervention works and thus provide guidance to optimize behavioral weight-loss programs. This study examined the mediating role of adherence to self-monitoring of diet and physical activity on weight loss in a behavioral weight-loss trial testing the use of personal digital assistants (PDA) for self-monitoring. Methods: Mediation analysis was conducted to examine the possible mediating role of adherence to self-monitoring of diet and physical activity between treatments using varying self-monitoring methods (paper record, PDA, and PDA with daily tailored feedback messages) and weight loss. Findings: The sample (N = 210) was predominantly white (78%) and female (85%). Compared to a paper record, using a PDA for self-monitoring diet (P = 0.027) and physical activity (P = 0.014) had significant direct effects on weight loss at 12 months, as well as a significant indirect effect on outcomes through improved adherence to self-monitoring (PS < 0.001). Receiving an automated daily feedback message via PDA only had a significant indirect effect on weight through self-monitoring adherence to diet (P = 0.004) and physical activity (P = 0.002). Conclusions: Adherence to self-monitoring of diet and physical activity is important as the underlying mechanism in this technology-supported behavioral weight-loss intervention.

Original languageEnglish (US)
Pages (from-to)221-226
Number of pages6
JournalPatient Preference and Adherence
Volume6
DOIs
StatePublished - 2012
Externally publishedYes

Keywords

  • Adherence
  • Behavioral intervention
  • Mediation analysis
  • Mobile technology
  • Self-monitoring
  • Weight loss

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Social Sciences (miscellaneous)
  • Pharmacology, Toxicology and Pharmaceutics (miscellaneous)
  • Health Policy

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